Tank holder



FIG. 1 is a front isometric view of the tank holder, which embodies my design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a back side view thereof;

FIG. 5 is a front side view thereof;

FIG. 6 is a side view thereof;

FIG. 7 is a side view thereof;

FIG. 8 is a front isometric view thereof shown in environmental use;

FIG. 9 is a top plan view thereof shown in environmental use;

FIG. 10 is a bottom plan view thereof shown in environmental use;

FIG. 11 is a side view thereof shown in environmental use;

FIG. 12 is a side view thereof shown in environmental use;

FIG. 13 is a side view thereof shown in environmental use; and,

FIG. 14 is a side view thereof shown in environmental use.

The broken line depicting the straps in FIGS. 8-14 illustrate environmental subject matter that forms no part of the claimed design. 

CLAIM The ornamental design for a tank holder, as shown and described. 